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您现在的位置: 木哥机械资料商城 >> 机械翻译类 >> 变速箱齿轮的设计
设计名称
  变速箱齿轮的设计
设计编号
  A8-178
设计软件
  Word
包含内容
  WORD文档
说明书页数
  10页(中英文)
图纸数量
  机械翻译(无图)
推荐指数
  较好
价格:
  优惠中
整理日期
  2012,07,19
整理人
  小木
购买流程
  <点此查看如何购买本站设计>
设计简介

附录1
变速箱齿轮的设计准则:
由于汽车变速箱各挡齿轮的工作情况是不相同的,所以按齿轮受力、转速、噪声要求等情况,应该将它们分为高挡工作区和低挡工作区两大类。齿轮的变位系数、压力角、螺旋角、模数和齿顶高系数等都应该按这两个工作区进行不同的选择。
高挡工作区:通常是指三、四、五挡齿轮,它们在这个区内的工作特点是行车利用率较高,因为它们是汽车的经济性挡位。在高挡工作区内的齿轮转速都比较高,因此容易产生较大的噪声,特别是增速传动,但是它们的受力却很小,强度应力值都比较低,所以强度裕量较大,即使削弱一些小齿轮的强度,齿轮匹配寿命也在适用的范围内。因此,在高挡工作区内齿轮的主要设计要求是降低噪声和保证其传动平稳,而强度只是第二位的因素。
低挡工作区:通常是指一、二、倒挡齿轮,它们在这个区内的工作特点是行车利用率低,工作时间短,而且它们的转速比较低,因此由于转速而产生的噪声比较小。但是它们所传递的力矩却比较大,轮齿的应力值比较高。所以低挡区齿轮的主要设计要求是提高强度,而降低噪声却是次要的。
在高挡工作区,通过选用较小的模数、较小的压力角、较大的螺旋角、较小的正角度变位系数和较大的齿顶高系数。通过控制滑动比的噪声指标和控制摩擦力的噪声指标以及合理选用总重合度系数、合理分配端面重合度和轴向重合度,以满足现代变速箱的设计要求,达到降低噪声、传动平稳的最佳效果。而在低挡工作区,通过选用较大的模数、较大的压力角、较小的螺旋角、较大的正角度变位系数和较小的齿顶高系数,来增大低挡齿轮的弯曲强度,以满足汽车变速箱低挡齿轮的低速大扭矩的强度要求。以下将具体阐述怎样合理选择这些设计参数。
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附录2
Gearbox design criteria:
As the automobile gearbox stall the work gear is not the same, so according to gear force, speed, noise requirements, etc., they should be divided into high and low-end work area work area two broad categories. Gear modification coefficient, pressure angle, helix angle, modulus and Addendum coefficient and so on should be based on the work areas of these two different options.
High-grade work area: usually refers to the three, four, five-speed gears, they work in this area is characterized by a higher utilization rate of traffic, because they are economical car stalls. In the high-end gear working area than the higher speed, so easy to have a greater noise, especially the growth rate of transmission, but their force was small, the intensity of stress values are relatively low, so strength margin, so even after weaken the strength of some small gear, gear matching is also applicable within the framework of life. Therefore, in high gear the work of the major design requirements for the region is to reduce noise and ensure a smooth transmission, while the intensity is only the second factor.
Low-grade work area: usually refers to the first, second and reverse gears, they work in this area is characterized by low utilization rate of traffic, working time is short, and their speed is relatively low, so the noise generated due to rotational speed is relatively small. But the moment they are transmitted is larger, tooth stress values are relatively high. Therefore, the main gear low area design requirements is to improve the strength, while the noise reduction is secondary.
In the high-end work area, through the use of smaller modulus, the smaller the pressure angle, the larger the helix angle, the smaller is the angle variable coefficient and a larger Addendum coefficient. Noise ratio by controlling the sliding friction of indicators and control of noise indicators, and a reasonable selection of the total coincidence coefficient, reasonable distribution of end-of coincidence degree and axial coincidence degree, in order to meet the design requirements of modern transmissions, to reduce the noise, transmission of the most stable good results. In the low-grade work area, through the selection of the larger modulus, the larger pressure angle, the smaller helix angle, the larger is the angle variable coefficient and a smaller Addendum coefficient,
To increase the low-end gear bending strength to meet the low-speed auto gearbox gear high-torque low strength requirements. The following will specifically set out what a reasonable selection of these design parameters.
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此为机械毕业设计之翻译

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